Vulnary
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Critical· 9.8

CVE-2026-4003

The Users manager – PN plugin for WordPress allows unauthenticated users to change any user’s metadata, including secret tokens, because the plugin’s AJAX endpoint lacks proper authorization checks. This flaw lets attackers modify data for any account without needing to log in. The vulnerability exists in all plugin versions up to 1.1.15.

publishedApr 8, 2026
last modifiedJul 24, 2026
sourcesNVD
severity · cvss
9.8
critical · how bad it is
exploitation · epss
<1%
56th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Sep 7, 2026

No official fix yet. If none appears within 45 days of first tracking, this entry is removed automatically.

01

Who is affected

WordPress sites using the Users manager – PN plugin, versions 1.1.15 and earlier.

02

Real-world impact

An attacker can alter any user’s metadata, potentially changing passwords, roles, or secret tokens, which can lead to full account takeover and compromise of the entire WordPress site.

03

Why this severity

The CVSS score of 9.8 reflects that the flaw is exploitable over the network, requires no authentication, and gives attackers complete control over user data, resulting in confidentiality, integrity, and availability loss.

04

What to do about it

no official fix yet

No official fix or mitigation is documented in the sources yet. Monitor the vendor advisory and apply the patch as soon as it is released.

No fix documented in sources

05

Timeline

  1. Apr 8, 2026 · Apr 8, 2026
    Published
    Disclosed and added to the National Vulnerability Database.
  2. Jul 24, 2026 · 11d ago
    Advisory updated
    The NVD record was last revised.
06

How it’s attacked

Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredNone
User interactionNone needed
ScopeUnchanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
07

References & advisories

NVD advisory ↗Search advisories ↗
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →